Facing the issue of setting the origin
It's not perfect to see in the screenshot, but isn't the object just circled around the world's origin (where the 3D cursor is at the moment)? So did you try going to Object Mode, right-clicking the object, then in the context menu choose Set Origin &gt; Origin to 3D Cursor?
EDIT: Or maybe it's not circling around the world origin. What about selecting the vertices that are furthest on X and -X as well as the ones furthest on Y and -Y. When they are selected, Shift+S &gt; Cursor to Selected, go to Object Mode and like suggested before, set origin to 3D Cursor?